Teen Convicted in Fatal Stabbing Now Isolated in County Jail

When a jury found Karmelo Anthony guilty of murder, the verdict marked the end of one chapter—but the beginning of another far grimmer one. The 19-year-old is now behind bars at Collin County Jail, but he’s not doing time like most inmates. Instead, Anthony has been placed in isolation, separated from the general population in a more secure area of the facility.

The case itself was stark and devastating. At a 2025 high school track meet in Frisco, Texas, Anthony walked into the tent of a rival school, where an altercation with fellow teenager Austin Metcalf escalated into tragedy. Anthony pulled a knife from his bag and fatally stabbed Metcalf—a moment that would reshape the lives of everyone involved. Anthony’s legal team argued self-defense, but the jury disagreed with that narrative.

The sentencing reflected the severity of the conviction: 35 years in prison. That’s more than a third of a century behind bars for someone who was still a teenager when the incident occurred. While Collin County Jail officials confirmed Anthony’s isolated status, they declined to explain the specific reasons for keeping him separated from other inmates—though the implication is clear enough. A jail representative told media outlets that the facility is taking appropriate steps to ensure the safety and security of all inmates, which is code for: this is a precaution.

For now, Anthony will remain in county lockup while arrangements are made for him to transfer to a state prison. The isolation isn’t permanent, but it reflects a harsh reality: when you’re convicted of killing another teenager, even your fellow inmates become a potential threat—or you become one to them. What started as a confrontation at a track meet has become a life sentence, one locked room at a time.